Patents by Inventor Utah CHOI

Utah CHOI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10304406
    Abstract: A display apparatus includes a display panel including a switching element connected to a data line and a gate line, a pixel electrode connected to the switching element, a common electrode facing the pixel electrode and a liquid crystal layer disposed between the pixel electrode and the common electrode. The display apparatus further includes a data driving circuit configured to convert image data to a data voltage. The display apparatus further includes a driving voltage generator configured to generate a common voltage, in response to a voltage control signal from a timing controller, to the common electrode and the data driving circuit, which is configured to output the common voltage to the pixel electrode during an initial setting period when power is turned on to the display apparatus.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: May 28, 2019
    Assignee: SAMSUNG DISPLAY CO., Ltd.
    Inventors: Jeong-Oh Jin, Hyeok-Tae Kwon, Dongkeon Kim, Seonhye Kim, Se-Won Min, Hyunjung Son, Utah Choi
  • Patent number: 10062349
    Abstract: A display device includes a liquid crystal display and a power supply to apply a common voltage to a common electrode of the display. The power supply applies a first common voltage to the common electrode for a first period after power is turned on, and applies a second common voltage higher than the first common voltage to the common electrode until the power is turned off after the first period.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: August 28, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Utah Choi, Hyo-Chul Lee
  • Publication number: 20170178587
    Abstract: A display apparatus includes a display panel including a switching element connected to a data line and a gate line, a pixel electrode connected to the switching element, a common electrode facing the pixel electrode and a liquid crystal layer disposed between the pixel electrode and the common electrode. The liquid crystal layer is driven by a difference in voltages between a voltage applied to the pixel electrode and a voltage applied to the common electrode. The display apparatus further includes a data driving circuit configured to convert image data to a data voltage, a driving voltage generator configured to generate a common voltage applied to the common electrode and an analog source voltage applied to the data driving circuit, and a data switching circuit configured to output the common voltage to the data line during an initial setting period when power is turned on to the display apparatus.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 22, 2017
    Inventors: JEONG-OH JIN, HYEOK-TAE KWON, DONGKEON KIM, SEONHYE KIM, SE-WON MIN, HYUNJUNG SON, UTAH CHOI
  • Publication number: 20150379954
    Abstract: A display device includes a liquid crystal display and a power supply to apply a common voltage to a common electrode of the display. The power supply applies a first common voltage to the common electrode for a first period after power is turned on, and applies a second common voltage higher than the first common voltage to the common electrode until the power is turned off after the first period.
    Type: Application
    Filed: November 4, 2014
    Publication date: December 31, 2015
    Inventors: Utah CHOI, Hyo-Chul LEE
  • Publication number: 20140293180
    Abstract: A liquid crystal display includes a substrate and a liquid crystal layer. The liquid crystal display further includes a first electrode disposed between the liquid crystal layer and the substrate. The liquid crystal display further includes a second electrode disposed between the liquid crystal layer and the substrate and configured to cooperate with the first substrate for generating an electric field to control molecules in the liquid crystal layer. The liquid crystal display further includes a reference voltage line configured to provide a reference voltage to the first electrode. The liquid crystal display further includes a reference voltage supplier configured to provide the reference voltage to the reference voltage line. The liquid crystal display further includes a reference voltage discharger electrically connected to the reference voltage line.
    Type: Application
    Filed: March 11, 2014
    Publication date: October 2, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hyun Seok HONG, Hyo-Chul LEE, Yeon-Sun NA, Utah CHOI
  • Publication number: 20140085288
    Abstract: A display device includes a display panel including a gate line, a data line, and a pixel connected to the gate line and the data line, a signal controller generating control signals for driving the display panel including a data load timing signal, a gate driver applying a gate voltage to the gate line, and a data driver applying a data voltage to the data line according to the data load timing signal received from the signal controller, wherein the data load timing signal includes a first load signal pulse and a different second load signal pulse, and where a width of the second load signal pulse is larger than a width of the first load signal pulse.
    Type: Application
    Filed: January 14, 2013
    Publication date: March 27, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Utah CHOI, Soon Kyoung KWON, Jin Woo PARK, Hyo-Chul LEE, Young Soo CHOI